Access to information :Based on research methods and tools specialized in verifying the veracity of information, based on a rigorous research platform. Use of written and digital documentation to help preserve information and protect against loss or change. Sources of information Sources of information include all the means, methods and tools by which information is obtained, whether written, visual or audible. Information sources are also referred to as any means of providing information previously disclosed, used for a purpose and subsequently usable in a field, such as information published in scientific journals, which is based on specific research resources. Types of information sources Access to information depends on various sources, broken down into the following types: Books The source of the first piece of information, which is the source of learning most widely used by people due to availability information in all fields and disciplines, In the original books of authors to verify the authenticity of information, books have been instrumental in supporting information sources, which come in many forms and types, and it is not enough not read books in a single field or type of information, Reading should be based on many other disciplines and should not be confined to the specialty of the reader.